It's been a while since my last post...
Since then I fiberglassed/epoxy'ed my breach slide (used 3 slip fittings) and started experimenting with breach openings.
Here's one...it's 5 inches total with one end beveled at 37.5 degrees (I think).

The barrel as shown is unpainted.

The plan is to paint the back fitting and front portion of the barrel, but keep the portion of barrel the slider slides over unpainted.

My solution to hide the unpainted portion of the barrel is a cloth camo 'tube' that will clamp to the front of the slider and to the barrel (covering the unpainted section). When the slider is pushed forward the cloth will simply bunch up allowing the slider to move over unpainted pvc. When the slider is pulled back the material will conceal that portion of the barrel.

It's been a while since my last post...
Since then I fiberglassed/epoxy'ed my breach slide (used 3 slip fittings) and started experimenting with breach openings.
Here's one...it's 5 inches total with one end beveled at 37.5 degrees (I think).

The barrel as shown is unpainted.

The plan is to paint the back fitting and front portion of the barrel, but keep the portion of barrel the slider slides over unpainted.

My solution to hide the unpainted portion of the barrel is a cloth camo 'tube' that will clamp to the front of the slider and to the barrel (covering the unpainted section). When the slider is pushed forward the cloth will simply bunch up allowing the slider to move over unpainted pvc. When the slider is pulled back the material will conceal that portion of the barrel.

Pics to follow.

Here is the latest...

Of course, first of all, thanks and props to Boom Master as this is a shameless copy of his 'shorty' with very few modifications.

Second, check out my younger brother Tim's (tmauriello) laucher.http://www.pbnation.com/showthread.php?t=3848858
We've been working on these since we played at Wayne's World in FL last year.
I've opted for the short configuration, he's gone with the longer over-the-shoulder rocket launcher look.

I have a second barrel thats about 4" longer.
The barrel tip does have relief holes in case this is shot with the plug screwed in place. The tip is also held in place with set screws, so it's easy to remove the breach slide and cloth sleeve if I want to move them to the longer barrel.

This shows the breach closed and opened. The cloth sleeve is clamped to the front end of the breach slide and to the barrel farther forward. The barrel underneath the cloth sleeve is unpainted so the breach slides very smoothly:

I had this with me at White River in July (where tmauriello successfully shot his), but had issues with the reg (I didn't realize that the input and guage ports on the Fatty were not interchangeable...my bad ).

This has been corrected and it's possible that both of us will be at Training Day at Fox in September. It sounds like it's gonna be a target rich environment!